Blend door actuator location

Tiny
JOSE ROLANDO SANTIAGO
  • MEMBER
  • 2014 RAM 3500
  • 6.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
My truck's heater is not working all the more if A/C. What can be?
Sunday, January 27th, 2019 AT 5:44 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi and thanks for using 2carpros.com

The blend air door actuator is responsible for allowing heat or AC into the vehicle. If the fan is running but it won't produce heat, first take a look through this link. I am basing this on the title of your post. If I am not correct, let me know.

https://www.2carpros.com/articles/car-heater-not-working

If you feel the blend door actuator is the problem and none of the other things mentioned, here is a link that shows in general how one is replaced.

https://www.2carpros.com/articles/replace-blend-door-motor

Here are the directions specific to your vehicle for removal and replacement of the actuator. The attached pictures correlate with these directions. Both single and dual zone systems are listed.

__________________________

BLEND DOOR ACTUATOR - REMOVAL
REMOVAL

WARNING:
Disable the airbag system before attempting any steering wheel, steering column or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable and wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury.

NOTE:
The single zone heating-A/C system is equipped with a single blend door actuator. The dual zone system has two blend door actuators, one for the driver side blend-air door and one for the passenger side blend-air door.

SINGLE ZONE/DUAL ZONE DRIVER SIDE

pic 1

1. Disconnect and isolate the negative battery cable.

2. Remove the glove box See: Glove Compartment > Removal and Replacement > Instrument Panel Glove Box - Removal.

3. Disconnect the HVAC wire harness connector (1) from the blend door actuator (2) located at the rear of the HVAC housing (3).

4. Remove the two screws (4) that secure the blend door actuator to the HVAC housing and remove the actuator.

DUAL ZONE PASSENGER SIDE

pic 2

1. Disconnect and isolate the negative battery cable.

2. Remove the HVAC housing (1) from the vehicle and place it on a workbench See: Housing Assembly HVAC > Removal and Replacement > HVAC Housing - Removal.

3. Disconnect the HVAC wire harness connector (2) from the blend door actuator (3) located at the front of the HVAC housing.

4. Remove the two screws (4) that secure the blend door actuator to the HVAC housing and remove the actuator.

___________________

INSTALLATION

NOTE:
The single zone heating-A/C system is equipped with a single blend door actuator. The dual zone system has two blend door actuators, one for the driver side blend-air door and one for the passenger side blend-air door.

SINGLE ZONE/DUAL ZONE DRIVER SIDE

Pic 3

1. Position the blend door actuator (1) to the back of the HVAC housing (4). If necessary, rotate the actuator slightly to align the splines on the actuator output shaft (2) with those on the actuator coupler (3).

Pic 4

2. Install the two screws (4) that secure the blend door actuator (2) to the HVAC housing (3). Tighten the screws to 1.1 Nm (10 in. lbs.).

3. Connect the HVAC wire harness connector (1) to the blend door actuator.

4. Install the glove box See: Glove Compartment > Removal and Replacement > Instrument Panel Glove Box - Installation.

5. Reconnect the negative battery cable.

6. Initiate the Actuator Calibration function using a scan tool See: Heating and Air Conditioning > Component Tests and General Diagnostics > A/C Performance.

DUAL ZONE PASSENGER SIDE

Pic 5

1. Position the blend door actuator (1) to the front of the HVAC housing (4). If necessary, rotate the actuator slightly to align the splines on the actuator output shaft (2) with those on the actuator coupler (3).

Pic 6

2. Install the two screws (4) that secure the blend door actuator (3) to the HVAC housing (1). Tighten the screws to 1.1 Nm (10 in. lbs.).

3. Connect the HVAC wire harness connector (2) to the blend door actuator.

4. Install the HVAC housing See: Housing Assembly HVAC > Removal and Replacement > HVAC Housing - Installation.

5. Reconnect the negative battery cable.

6. Initiate the Actuator Calibration function using a scan tool See: Heating and Air Conditioning > Component Tests and General Diagnostics > A/C Performance.

_____________________

I hope this helps. Let me know if you have other questions.

Take care,
Joe
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Sunday, January 27th, 2019 AT 9:00 PM

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